Olympus Mons on Mars is the largest volcano in our Solar System, almost three times taller than Mount Everest on Earth. Submitted by: Mansi Kookani - Dubai, United Arab Emirates
Jupiter's core is non-metal, but due to the immense pressure inside Jupiter, the core has become a metal. This metal is liquid metallic hydrogen. Submitted by: Steady - Malmö, Sweden
Despite being closest to the sun, Mercury is not the hottest planet. The hottest planet is Venus (at 462 Celsius). Submitted by: DdsqawThe cosmos contains approximately 50,000,000,000 galaxies.sciensational.com Submitted by: Joshua - Canada
A large sunspot can last for about a week. Submitted by: Unknown - Panabo City, Philippines
The Earth orbits the sun at an average speed of 107,220 km/h. Submitted by: Andrew Loloy - Taguig, Philippines
There is a high and low tide because of our The Moon and the Sun. Submitted by: Unknown
The moon is one million times drier than the Gobi Desert. Submitted by: Eh - Canada
The planet Saturn has a density lower than water. So, if placed in water it would float.sciensational.com Submitted by: Wally D Albia - Quezon City Manila, PhilippinesThe Moon is 27% the size of the Earth. Submitted by: Unknown
Sunlight takes about 8 minutes & 20 seconds to reach the Earth at 299,792 km/s (186,282 mi/s). Submitted by: Nusrat Islam - Orlando, Florida, United States
An Astronaut can be up to 2 inches taller returning from space. The cartilage disks in the spine expand in the absence of gravity. Submitted by: Ballard - Charleston, South Carolina, United States